CN104109895B - A kind of method forming high corrosion resistance nickel and chromium composite deposite on steel surface - Google Patents
A kind of method forming high corrosion resistance nickel and chromium composite deposite on steel surface Download PDFInfo
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- CN104109895B CN104109895B CN201410323852.4A CN201410323852A CN104109895B CN 104109895 B CN104109895 B CN 104109895B CN 201410323852 A CN201410323852 A CN 201410323852A CN 104109895 B CN104109895 B CN 104109895B
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Abstract
The present invention is to provide a kind of method forming high corrosion resistance nickel and chromium composite deposite on steel surface.Steel through surface preparation are electroplated in the plating solution, carry out post processing again, every liter of water sulfur acid nickel 220 250g of described plating solution, Nickel dichloride. 20 40g, boric acid 20 40g, 1,4 butynediols 0.2 0.3g, Radix Acaciae senegalis 0.4g, phytic acid 0.2g, nanometer Cr powder 20g, average current density is 2.0 3.0A dm‑2, pulse frequency 250 800Hz, dutycycle 30% 50%, bath temperature 30 50 DEG C, mixing speed control at 3 5r/s.The present invention is compared with the technology of conventional plating process, chromium well disperses in the plating solution with the form of nanometer chromium granule, and under the effect of pulse current, chromium granule is plated on plating metal surface together with nickel, makes obtained thickness of coating big, the good dispersion of chromium, and the excellent corrosion-proof performance of coating.
Description
Technical field
The present invention relates to a kind of steel protection processing method, a kind of method forming overcoat at steel surface.
Background technology
Corrosion is the main failure forms of material, waste and the economic loss of the energy derive from corrosion greatly, show according to relevant research, get rusty and other corrosion has consumed about 1/10th of World Steel yield, and corrode and cause the most serious environmental pollution, destroy ecological balance, endanger people's health, hinder sustainable development.So using effective preventive means, it is the effective ways reducing corrosion and abrasion loss.
Composite plating technology is one of effective preventive means, can effectively play anti-corrosion, wear-resisting, antioxygenic property and the effect of decoration, due to its low cost, it is simple to large-scale production.So being widely used in fields such as aviation, electronics, machinery, chemical industry.
Nickel-chrome nano-composite plate is a kind of corrosion resistance coating with the biggest application prospect, the key factor determining this composite deposite corrosion resisting property is the dispersibility of nanometer chromium granule in coating, so, it is necessary how research improves the dispersibility of nanometer chromium granule in coating.
Summary of the invention
It is an object of the invention to provide that a kind of obtained thickness of coating is big, the method forming high corrosion resistance nickel and chromium composite deposite on steel surface of the excellent corrosion-proof performance of the good dispersion of chromium and coating.
The object of the present invention is achieved like this:
Steel through surface preparation are electroplated in the plating solution, carry out post processing again, every liter of water sulfur acid nickel 220-250g of described plating solution, Nickel dichloride. 20-40g, boric acid 20-40g, 1,4-butynediols 0.2-0.3g, Radix Acaciae senegalis 0.4g, phytic acid 0.2g, nanometer Cr powder 20g, average current density is 2.0-3.0A dm-2, pulse frequency 250-800Hz, dutycycle 30%-50%, bath temperature 30-50 DEG C, mixing speed control at 3-5r/s.
The present invention can also include:
1, described plating solution is prepared as follows: Isosorbide-5-Nitrae-butynediols, Radix Acaciae senegalis and phytic acid add at 30 DEG C a small amount of deionized water dissolving, adds nickel sulfate, Nickel dichloride., boric acid and deionized water, and stirring 24h obtains solution A；Nanometer Cr powder is put in ultrasonic 20min in a small amount of solution A and obtains solution B, solution B is divided with remaining solution A and mixes, allocate pH to 5-6 with ammonia immediately, be sufficiently stirred for 24h.
2, described surface preparation is: steel are after 150#, 400#, 800# sand papering, it is placed in ultrasonic cleaning 2h in acetone, with alkali wash water alkali cleaning oil removing 2h, finally dry up with dehydrated alcohol wiping, hair-dryer, preserve 24h in 60 DEG C of baking ovens, put in electroplating bath at once after 2 seconds by dilute hydrochloric acid activation processing before putting into electroplate liquid and electroplate.
3, after the steel after described post processing is by plating take out from electroplating bath, at once with deionized water ultrasonic cleaning 30 minutes, changed water once every 15 minutes, after ultrasonic cleaning, coating surface is polished gently and make coating surface smooth, finally dry up.
The key factor determining this composite deposite corrosion resisting property is the dispersibility of nanometer chromium granule in coating, the technical characterstic of the present invention is to make chromium well disperse in the plating solution with the form of nanometer chromium granule, under the effect of pulse current, chromium granule is plated on plating metal surface together with nickel, make obtained thickness of coating big, the good dispersion of chromium, and the excellent corrosion-proof performance of coating.The use of Radix Acaciae senegalis and the processing form of chromium powder are the key points of this technology.
The technique effect that the present invention has specifically includes that
(1) being technically characterized by comprising the steps as follows: in electroplate liquid of the present invention, chromium well disperses in the plating solution with the form of nanometer chromium granule, and under the effect of pulse current, chromium granule is plated on plating metal surface together with nickel.
(2) obtained nickel-chrome thickness of multiple plating is big, the good dispersion of chromium, and the excellent corrosion-proof performance of coating.
(3) technique for preparing coating is simple, low cost.
Accompanying drawing explanation
Fig. 1 high corrosion-resistant nickel-chrome composite deposite polarization curve.
Fig. 2 a-Fig. 2 b high corrosion-resistant nickel-chrome composite deposite SEM photograph.
Fig. 3 a-Fig. 3 b high corrosion-resistant nickel-chrome composite deposite cross section SEM photograph.
Detailed description of the invention
Below in conjunction with example, the present invention will be further described.
Embodiment 1:
By Q235 steel wire cut growth 50 millimeters, wide 20 millimeters, the sample of thick 5 millimeters；
Ultrasonic with the greasy dirt sonication treatment time 3h of residual during removing cutting sample with acetone soak；
It is placed on acetone ultrasonic cleaning 2h with 150#, 400#, 800# sand papering sample successively, then with alkali wash water alkali cleaning oil removing 2h, finally with dehydrated alcohol wiping Q235 steel, dries up with hair-dryer, preserve in being placed in 60 DEG C of baking ovens；
The configuration of plating solution: weigh nickel sulfate 220-250g, Nickel dichloride. 20-40g, boric acid 20-40g in the balance, add deionized water to after one liter, weigh 1 in the balance, 4-butynediols 0.2-0.3g, Radix Acaciae senegalis 0.4g, phytic acid 0.2g add above-mentioned solution, it is sufficiently stirred for 24 hours, finally weighs 20g nanometer chromium powder (about 60nm) and be put in ultrasonic 20min in a small amount of electroplate liquid, then gained solution is sufficiently mixed with electroplate liquid, allocate pH to 5-6 with ammonia immediately, be sufficiently stirred for 24h.
Before plating, sample dilute hydrochloric acid activation processing should be put into after 20 seconds at once electroplating bath plating, it is impossible to the most exposed in atmosphere.
Electroplating parameter should select average current density to be 2.0-3.0A dm-2, pulse frequency 250-800Hz, dutycycle 30%-50%, bath temperature 30-50 DEG C, mixing speed control to be advisable at 3-5r/s.
After plating sample is taken out from electroplating bath, water should be changed once every 15 minutes, coating surface should be polished gently after ultrasonic cleaning and make coating surface smooth at once with deionized water ultrasonic cleaning 30 minutes, finally dry up with hair-dryer.
Sample is SEM (scanning electron microscope).
High corrosion-resistant nickel-chrome composite deposite is placed in 3.5%NaCl and carries out electro-chemical test
After plating sample is taken out from electroplating bath, water should be changed once every 15 minutes, coating surface should be polished gently after ultrasonic cleaning and make coating surface smooth at once with deionized water ultrasonic cleaning 30 minutes, finally dry up with hair-dryer.
By polytetrafluoro by the sample parcel after plating, exposing work surface as electrode, area is 1
cm2, conveniently do electro-chemical test.
Claims (1)
1. the method forming high corrosion resistance nickel and chromium composite deposite on steel surface, is characterized in that:
(1) by Q235 steel wire cut growth 50 millimeters, wide 20 millimeters, the sample of thick 5 millimeters；
(2) when removing cutting sample with acetone soak is ultrasonic, the greasy dirt sonication treatment time of residual is 3h；
(3) it is placed on acetone ultrasonic cleaning 2h with 150#, 400#, 800# sand papering sample successively, then uses alkali cleaning liquid caustic soda
Eccysis oil 2h, finally with dehydrated alcohol wiping Q235 steel, dries up with hair-dryer, preserves in being placed in 60 DEG C of baking ovens；
(4) configuration of plating solution: claim nickel sulfate 220-250g, Nickel dichloride. 20-40g, boric acid 20-40g, add deionized water to
Rise and form solution A, claim Isosorbide-5-Nitrae-butynediols 0.2-0.3g, Radix Acaciae senegalis 0.4g, phytic acid 0.2g to add in solution A, fill
Divide stirring within 24 hours, to form solution B, finally weigh the nanometer chromium powder that 20g particle diameter is 60nm and be put in a small amount of solution B ultrasonic
20min, then gained solution is sufficiently mixed with remaining solution B, allocate pH to 5-6 with ammonia immediately, be sufficiently stirred for 24h；
Sample dilute hydrochloric acid activation processing should be put into after 20 seconds before plating electroplating bath plating at once, and electroplating parameter selects average electricity
Current density is 2.0-3.0A dm-2, pulse frequency 250-800Hz, dutycycle 30%-50%, bath temperature 30-50 DEG C, stirring
Speed controlling is at 3-5r/s；
After being taken out from electroplating bath by plating sample, at once with deionized water ultrasonic cleaning 30 minutes, changed water one every 15 minutes
Secondary, coating surface should be polished gently after ultrasonic cleaning and make coating surface smooth, finally dry up with hair-dryer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410323852.4A CN104109895B (en) | 2014-07-09 | 2014-07-09 | A kind of method forming high corrosion resistance nickel and chromium composite deposite on steel surface |
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| CN201410323852.4A CN104109895B (en) | 2014-07-09 | 2014-07-09 | A kind of method forming high corrosion resistance nickel and chromium composite deposite on steel surface |
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| CN111286777B (en) * | 2020-03-26 | 2021-03-02 | 中国南方电网有限责任公司超高压输电公司柳州局 | Composite coating and preparation method thereof |
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| JP3771210B2 (en) * | 2002-10-23 | 2006-04-26 | 荏原ユージライト株式会社 | Electric composite plating bath and electric composite plating method |
| FR2848219B1 (en) * | 2002-12-09 | 2006-12-01 | Centre Nat Rech Scient | COMPOSITE MATERIAL FOR USE AS LUBRICATING COATING |
| CN100445430C (en) * | 2004-12-03 | 2008-12-24 | 中国科学院金属研究所 | Anti-chlorine ion corrosion Ni-Cr nano composite coating and preparing method and use |
| CN103484901A (en) * | 2013-09-27 | 2014-01-01 | 昆山纯柏精密五金有限公司 | Nickel-plating process for hardware |
| CN103898563B (en) * | 2014-03-21 | 2016-06-29 | 哈尔滨工程大学 | Magnesium lithium alloy method for electroplating nickel on surface |
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